i was looking for a less-heavy nihtgtime lotion to assist with everything this serum says it will assist with and i have not been disappointed! after using it for only a week (just at bedtime) i noticed improvements. after two weeks, improvements were pointed out to me by others. apparently this can be used both morning and night, however i find that i like the roc lift serum for day use. either way, this is definitely worth the purchase.